if (!decoder.process(input, offset, len, true)) { throw new IllegalArgumentException("bad base-64");
if (!decoder.process(input, offset, len, true)) { throw new IllegalArgumentException("bad base-64");
if (!decoder.process(input, offset, len, true)) { throw new IllegalArgumentException("bad base-64");
if (!decoder.process(input, offset, len, true)) { throw new IllegalArgumentException("bad base-64");
if (!decoder.process(input, offset, len, true)) { throw new IllegalArgumentException("bad base-64");